内容正文:
同步竖式、脱式计算
11.含有两级运算一除减(1)
①80-40÷8
②40-42÷7
=80-5
=40-6
=75
=34
③50-20÷5
④82-81÷9
=50-4
=82-9
=46
=73
⑤54-15÷3
⑥92-14÷7
=54-5
=92-2
=49
=90
⑦72-36÷6
⑧61-28÷4
=72-6
=61-7
=66
=54
⑨44-35÷5
=44-7
=37
12.含有两级运算一—除减(2)
①51-24÷4
②33-18÷9
=51-6
=33-2
=45
=31
③12-15÷5
④20-12÷4
=12-3
=20-3
=9
=17
⑤33-64÷8
629-24÷3
=33-8
=29-8
=25
=21
⑦86-56÷8
⑧52-63÷9
=86-7
=52-7
=79
=45
⑨82-28÷4
035-28÷7
=82-7
=35-4
=75
=31
①44-32÷8
1218-25÷5
=44-4
=18-5
=40
=13
13.带小括号的混合运算
加减混合
①70-(40+8)
②85-(50+7)
=70-48
=85-57
=22
=28
③51-(30+3)
④92-(70+4)
=51-33
=92-74
=18
=18
⑤66-(40+21)
688-(50+21)
=66-61
=88-71
=5
=17
⑦70-(40+6)
856-(20+21)
=70-46
=56-41
=24
=15
⑨35-(15+13)
=35-28
=7
14.带小括号的混合运算
乘加混合
①7×(4+4)
②5×(5+4)
=7×8
=5×9
=56
=45
③3×(6+3)
④8×(2+4)
=3×9
=8×6
=27
=48
⑤4×(2+7)
62×(4+3)
=4×9
=2×7
=36
=14
4·11含有两级运算—除减(
⊙易错点分析计算含有减法和除法的算式时,没有先算除法。
计算:45-30÷5
○錯误解答
Q错误改正
45-30÷5
45-30÷5
15÷5
、①
45-6
·运算倾序错误。
3
39②
应先算除法,
再算减法
⑦计算常练
用时:
分秘错误:
个
家长评价:☆☆☆☆☆一
①80-40÷8
240-42÷7
350-20÷5
482-81÷9
554-15÷3
⑥92-14÷7
7)72-36÷6
8)61-28÷4
9)44-35÷5
见此图标显抖音/微信扫码掌握技巧,笔算快人一步!
12含有两级运算—
除减(2)
①计算常练
用时:
分秒
错误:
个
家长评价:☆☆☆☆☆
①51-24÷4
②33-18÷9
312-15÷5
420-12÷4
533-64÷8
!
629-24÷3
786-56÷8
8)52-63÷9
982-28÷4
1035-28÷7
1①44-32÷8
1218-25÷5
12
同步竖式、脱式计算·三年级·北师版·上册