六、小数的加法和减法-【数学365计划】2026-2027学年四年级数学计算题专项练

=59×100 49×90+49×110 29.19+14=43.19 =5900 =49×(90+110) 29.19 =49×200 +114 第115天 43.19 =9800 25×405 196+355 25-17.54=7.46 =25×(400+5) =200-4+355 25.00 17.54 =25×400+25×5 =555-4 7.46 =10000+125 =551 =10125 310×62+380×31 7.7+8.32=16.02 653-498 =310×62+38×310 7.7 18.32 =653-(500-2) =310×(62+38) 16.02 =653-500+2 =310×100 51.5+3.44=54.94 =153+2 =31000 51.5 =155 14×47+54×14-14 3.44 463-136-164 =14×(47+54-1) 54.94 =463-(136+164) =14×100 19.4-2.58=16.82 =463-300 =1400 1940 =163 第116天 2.58 80÷5÷8 16.82 6.35+1.29=7.64 =80÷8÷5 78.49+11.5=89.99 6.35 =10÷5 78.49 +1.219 +11.5 =2 7.64 89.99 15×(100+6) 4.62+15.38=20 =15×100+15×6 0.88+5.88=6.76 4.62 0.88 =1500+90 +115.318 +5.818 =1590 20.00 6.76 492-405 9.12-3.87=5.25 0.71-0.21=0.5 =492-400-5 9.i2 0.71 =92-5 3.87 0.21 =87 5.25 0.50 4×58×25 15.62-0.97=14.65 27.03-7.69=19.34 =4×25×58 15.62 27.03 =100×58 0.97 7.69 =5800 14.65 19.34 69.47-54.8=14.67 6947 -54.8 14.67 11.23+1.23=12.46 11.23 +1.23 12.46 第117天 24-3.63=20.37 2400 3.63 20.37 3.49+6.75=10.24 3.49 +161.715 10.24 52.2-30.68=21.52 5 2.20 -30.68 21.52 98+11.93=109.93 98 +111.93 109.93 87.93-64=23.93 87.93 -64 23.93 5.23+4.07=9.3 5.23 +4.017 9.30 参考答案45⊙ 15.42-7.38=8.04 第118天 i5.42 7.38 19.37-8.4=10.97 8.04 19.37 25.4-13.46=11.94 8.4 25.40 10.97 -13.46 72.97-30.8=42.17 11.94 72.97 36-0.99=35.01 -30.8 36.00 42.17 0.99 35.01 16.48+23.5=39.98 108.7+2.39=111.09 16.48 +23.5 108.7 39.98 12.39 111.09 64.1-25.33=38.77 90-25.68=64.32 64.i0 9ò.00 25.33 -25.68 38.77 64.32 4.5+44.55=49.05 3.33+33.3=36.63 4.5 3.33 +44.55 +33.3 49.05 36.63 13.56-9.76=3.8 26.77-18.5=8.27 26.77 i3.56 9.76 -18.5 3.80 8.27 34-12.77=21.23 55-23.61=31.39 55.00 34.00 -23.61 -12.77 31.39 21.23 43.7+26.13=69.83 9.65+13.7=23.35 43.7 9.65 +26.13 +113.7 69.83 23.35 (⊙46小学四年级数学365计划 22.8-5.23=17.57 78.7-36.83=41.87 22.80 7870 5.23 36.83 17.57 41.87 0.8+5.94=6.74 15.49+24.5=39.99 15.49 0.8 +24.5 +5.94 39.99 6.74 7.85+19.45=27.3 13.78-9.6=4.18 7.85 i3.78 +119.415 9.6 27.30 4.18 14.6+28.79=43.39 15.98+4.2=20.18 14.6 15.98 +218.79 14.2 43.39 20.18 31.04-16.8=14.24 66-16.6=49.4 31,04 66.0 16.8 16.6 14.24 49.4 64.29-15.33=48.96 35.5+35.5=71 64.29 15.33 35.5 48.96 +315.5 71.0 5.99+15.9=21.89 5.99 6.04-4.28=1.76 +1159 6.04 21.89 一 4.28 36.77-36.7=0.07 1.76 36.77 36.7 第119天 0.07 0.8+0.88=1.68 4.85+48.5=53.35 0.8 4.85 +0.88 +418.5 1.68 53.35 3.63+17.7=21.33 27.04-5.3=21.74 3.63 27.04 +1177 5.3 21.33 21.74 64.1+5.43=69.53 0.45+27.55=28 0.45 64.1 +27.515 +5.43 28.00 69.53 45.02+6.29=51.31 14.2-8.36=5.84 45.02 i4.20 16.219 8.36 51.31 5.84 16.34-6.07=10.27 6.84+23.95=30.79 16.34 6.84 6.07 +213.95 10.27 30.79 38.6+0.77=39.37 35.01-29.47=5.54 38.6 35.01 0.77 -29.47 39.37 5.54 11-5.35=5.65 ii,00 第120天 5.35 5.65 27-2.7=24.3 16.53-2.7=13.83 27.0 -2.7 16.53 24.3 2.7 13.83 18.4-2.35=16.05 9.04-3.1=5.94 18.40 -2.35 9.04 3.1 16.05 5.94 10.03-6.04=3.99 30.42-4.19=26.23 i0.03 30.42 6.04 4.19 3.99 26.23 6.17-1.6=4.57 6.17 -1.6 4.57 4.41-4.36=0.05 4.41 -4.36 0.05 100-28.77=71.23 i0000 28.77 71.23 第121天 1.58+2.62+3.38 =1.58+(2.62+3.38) =1.58+6 =7.58 25.97+(9.65-1.7) =25.97+7.95 =33.92 15.6+3.55+4.4 =15.6+4.4+3.55 =20+3.55 =23.55 0.8+5.94+2.2+ 4.06 =(0.8+2.2)+(5.94+ 4.06) =3+10 =13 5.84-1.8-3.84 =5.84-3.84-1.8 =2-1.8 =0.2 25.48-(9.4+0.52) =25.48-0.52-9.4 =24.96-9.4 =15.56 35.6-1.8-15.6-7.2 =(35.6-15.6)-(1.8+ 7.2) =20-9 =11 8.14-0.53-2.47- 0.14 =(8.14-0.14)-(0.53+ 2.47) =8-3 =5 3.25+2.76+1.75 =3.25+1.75+2.76 =5+2.76 =7.76 23.46+8.07-3.46+ 1.93 =(23.46-3.46)+ (8.07+1.93) =20+10 =30 第122天 8.14-(6.43-4.86) =8.14-6.43+4.86 =8.14+4.86-6.43 =13-6.43 =6.57 10.65-(4.24+1.65) =10.65-1.65-4.24 =9-4.24 =4.76 参考答案47⊙ 59.4+30.87-45.6 =59.4-45.6+30.87 =13.8+30.87 =44.67 5.25+3.76-2.76+ 4.75 =(5.25+4.75)+(3.76- 2.76) =10+1 =11 64.95+48.27-15.5 =113.22-15.5 =97.72 18.43+1.37+22.4 =19.8+22.4 =42.2 15.73+18.9+23.66 =34.63+23.66 =58.29 50-23.3+14.55 =26.7+14.55 =41.25 72.1-45.88+3.26 =26.22+3.26 =29.48 17.9+5.55+3.1 =17.9+3.1+5.55 =21+5.55 =26.55 第123天 25.06-15.28+3.7 =9.78+3.7 =13.48 048小学四年级数学 46.66-2.34+5.7 =10+4.97 =44.32+5.7 =14.97 =50.02 第124天 5.27-1.98-0.02 =5.27-(1.98+0.02) 7.5+22.55-3.61 =5.27-2 =30.05-3.61 =3.27 =26.44 4.8-3.65+5.2 5.47+0.23+0.4 =5.7+0.4 1.35 =6.1 =(4.8+5.2)-(3.65+ 19.8+5.66+27.3 1.35) 25.46+27.3 =10-5 =52.76 =5 9.3+8.8+19.99 4.28+13.72-2.65 =18.1+19.99 =18-2.65 =38.09 -15.35 13.5+23.55+3.5 9.6-0.75-2.18 =13.5+3.5+23.55 =8.85-2.18 =17+23.55 =6.67 =40.55 3.2+(25.78+6.8) 5-2.88+37.6 =3.2+6.8+25.78 =2.12+37.6 =10+25.78 =39.72 =35.78 60-23.47-3.7 5.75-4.87+4.25 =36.53-3.7 5.13 =32.83 =(5.75+4.25)-(487+ 84-25.4-16.44 5.13) =58.6-16.44 =10-10 =42.16 =0 56.2-(25.78+6.2) 72-6.54+33.1 =56.2-6.2-25.78 =65.46+33.1 =50-25.78 =98.56 =24.22 3.7+4.97+6.3 12.75-(11.2-7.25) =3.7+6.3+4.97 =12.75+7.25-11.2 65计划 =20-11.2 =8.8 第125天 9.99+28.7-11.01 =38.69-11.01 =27.68 70.03+15.6-25.33 =85.63-25.33 =60.3 4.85+44.8-31.07 =49.65-31.07 =18.58 40.66-23.18-6.8 =17.48-6.8 =10.68 77.23+13.8+0.7 =91.03+0.7 =91.73 26.54+33.59-18.08 =60.13-18.08 =42.05 45.02-31-4.4 =14.02-4.4 =9.62 86.77+0.88-23.5 =87.65-23.5 =64.15 96-28.88-19.4 =67.12-19.4 =47.72 36.06-24.18+16.66 =11.88+16.66 =28.54第116天 6.35+1.29= 15.62-0.97= 7.7+8.32= 78.49+11.5= 27.03-7.69= ⊙122小学四年级数学36 》》 竖式计算 4.62+15.38= 29.19+14= 51.5+3.44= 0.88+5.88= 69.47-54.8= 计划 用时： 9.12-3.87= 25-17.54= 19.4-2.58= 0.71-0.21= 11.23+1.23= 第117天 24-3.63= 98+11.93= 15.42-7.38= 108.7+2.39= 26.77-18.5= 》》 竖式计算 3.49+6.75= 87.93-64= 25.4-13.46= 90-25.68= 55-23.61= 用时： 52.2-30.68= 5.23+4.07= 36-0.99= 3.33+33.3= 43.7+26.13= 小数的加法和减法123⊙ 第118天 19.37-8.4= 64.1-25.33= 34-12.77= 0.8+5.94= 66-16.6= ⊙124小学四年级数学36 》》 竖式计算 72.97-30.8= 4.5+44.55= 9.65+13.7= 13.78-9.6= 35.5+35.5= 计划 用时： 16.48+23.5= 13.56-9.76= 22.8-5.23= 15.98+4.2= 6.04-4.28= 第119天 0.8+0.88= 7.85+19.45= 64.29-15.33= 4.85+48.5= 14.2-8.36= 》》 竖式计算 78.7-36.83= 14.6+28.79= 5.99+15.9= 3.63+17.7= 6.84+23.95= 用时： 15.49+24.5= 31.04-16.8= 36.77-36.7= 64.1十5.43= 35.01-29.47= 小数的加法和减法125⊙ 第120天 27-2.7= 27.04-5.3= 16.34-6.07= 16.53-2.7= 6.17-1.6= ⊙126小学四年级数学36 》》 竖式计算 18.4-2.35= 0.45+27.55= 38.6+0.77= 9.04-3.1= 4.41-4.36= 计划 .- 用时： 10.03-6.04= 45.02+6.29= 11-5.35= 30.42-4.19= 100-28.77= 第121天 1.58+2.62+3.38 15.6+3.55+4.4 5.84-1.8-3.84 35.6-1.8-15.6-7.2 3.25+2.76+1.75 49 脱式计算 用时： 25.97+(9.65-1.7) 0.8+5.94+2.2+4.06 25.48-(9.4+0.52) 8.14-0.53-2.47-0.14 23.46+8.07-3.46+1.93 小数的加法和减法127⊙ 第122天 》》 8.14-(6.43-4.86) 59.4+30.87-45.6 64.95+48.27-15.5 15.73+18.9+23.66 72.1-45.88+3.26 ⊙128小学四年级数学365计划 脱式计算 用时： 10.65-(4.24+1.65) 5.25+3.76-2.76+4.75 18.43+1.37+22.4 50-23.3+14.55 17.9+5.55+3.1 第123天 》》 25.06-15.28+3.7 5.27-1.98-0.02 4.28+13.72-2.65 3.2+(25.78+6.8) 72-6.54+33.1 脱式计算 用时： 46.66-2.34+5.7 4.8-3.65+5.2-1.35 9.6-0.75-2.18 5.75-4.87+4.25-5.13 3.7+4.97+6.3 小数的加法和减法129⊙ 第124天 》》 7.5+22.55-3.61 19.8+5.66+27.3 13.5+23.55+3.5 60-23.47-3.7 56.2-(25.78+6.2) ⊙130小学四年级数学365计划 脱式计算 用时： 5.47+0.23+0.4 9.3+8.8+19.99 5-2.88+37.6 84-25.4-16.44 12.75-(11.2-7.25) 第125天 》》 9.99+28.7-11.01 4.85+44.8-31.07 77.23+13.8+0.7 45.02-31-4.4 96-28.88-19.4 脱式计算 用时： 70.03+15.6-25.33 40.66-23.18-6.8 26.54+33.59-18.08 86.77+0.88-23.5 36.06-24.18+16.66 小数的加法和减法131⊙