内容正文:
2025-2026学年四年级数学下册人教版
第一单元计算专项05:带有中括号的混合运算
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一、列综合算式
1.在下图框中按照顺序填入计算结果,并列出综合算式。
综合算式是:( )。
2.请根据下图中的运算顺序,写出综合算式:( )。
3.按照顺序计算并填写下面的,然后列出综合算式。
综合算式:________________________________________
4.看图,先计算再列综合算式。
(1)
综合算式:________________________________________________
(2)
综合算式:________________________________________________
5.在□里填上适当的数,然后列出综合算式。
综合算式:____________________________ 综合算式:____________________________
二、括号内一步加减,中括号内一步加减,括号外乘除
(1)[150 + (480 - 230)] × 6 (2)[320 - (190 + 80)] × 5
(3)800 ÷ [(270 - 150) + 40] (4)950 ÷ [350 - (120 + 180)])
(5)[(520 + 180) - 360] × 7 (6)[650 - (420 - 170)] × 3
(7)750 ÷ [(180 + 120) - 250] (8)630 ÷ [400 - (210 + 160)]
三、小括号内一步加减,中括号内乘除运算
(1)[(640 - 320) ÷ 8] × 12 (2)[(280 + 320) × 5] ÷ 30
(3)450 ÷ [(150 - 100) × 3] (4)560 × [(210 + 190) ÷ 8]
(5)[(720 - 480) × 4] ÷ 60 (6)[(350 + 250) ÷ 10] × 18
(7)810 ÷ [(360 - 270) ÷ 3] (8)320 × [(540 - 360) ÷ 9]
四、中括号内包含两步运算(先乘除后加减)
(1)600 ÷ [(30 + 20) × 3 - 90] (2)[180 + (45 × 4) - 120] × 5
(3)900 ÷ [(120 ÷ 6) + (80 - 50)] (4)[(25 × 8) + (360 ÷ 12) - 150] × 4
(5)720 ÷ [(15 × 6) - (180 ÷ 3)] (6)[(70 × 5) - (210 ÷ 7) + 80] × 2
(7)576 ÷ [(240 ÷ 8) + (35 - 17)]) (8)[(12 × 15) + (480 ÷ 16) - 130] × 3
五、综合类型(括号内包含两步运算)
(1)[(160 + 240) ÷ 8 - 20] × 15 (2)880 ÷ [(30 × 5) - (250 ÷ 5) + 10])
(3)[(420 - 180) ÷ 6 + 35] × 12 (4)675 ÷ [(18 × 5) - (120 ÷ 4) + 15])
(5)[(280 + 320) ÷ 10 - 45] × 18 (6)900 ÷ [(25 × 4) - (180 ÷ 6) + 20])
(7)[(560 - 320) ÷ 4 + 28] × 10 (8)800 ÷ [(12 × 8) - (90 ÷ 3) + 14])
第 1 页 共 8 页
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参考答案
一、列综合算式
1.60×[(270+54)÷27]
=60×[324÷27]
=60×12
=720
因此,综合算式是:60×[(270+54)÷27]=720。
2.根据分析可知:
综合算式是:248÷[(28+36)÷8]=31
3.根据分析可知:
综合算式:8×[(50+75)÷5]=200
4.(1)[196-(96+4)]÷8
=[196-100]÷8
=96÷8
=12
综合算式:[196-(96+4)]÷8=12
(2)5×[(215+123)÷26]
=5×[338÷26]
=5×13
=65
综合算式:5×[(215+123)÷26] =65
5.(1)180+540=720
720×27=19440
(180+540)×27
=720×27
=19440
(2)804-36=768
768÷32=24
415-24=391
415-[(804-36)÷32]
=415-[768÷32]
=415-24
=391
二、括号内一步加减,中括号内一步加减,括号外乘除
(1)[150 + (480 - 230)] × 6
= [150 + 250] × 6
= 400 × 6
= 2400
(2)[320 - (190 + 80)] × 5
= [320 - 270] × 5
= 50 × 5
= 250
(3)800 ÷ [(270 - 150) + 40]
= 800 ÷ [120 + 40]
= 800 ÷ 160
= 5
(4)950 ÷ [350 - (120 + 180)])
= 950 ÷ [350 - 300]
= 950 ÷ 50
= 19
(5)[(520 + 180) - 360] × 7
= [700 - 360] × 7
= 340 × 7
= 2380
(6)[650 - (420 - 170)] × 3
= [650 - 250] × 3
= 400 × 3
= 1200
(7)750 ÷ [(180 + 120) - 250]
= 750 ÷ [300 - 250]
= 750 ÷ 50
= 15
(8)630 ÷ [400 - (210 + 160)]
= 630 ÷ [400 - 370]
= 630 ÷ 30
= 21
三、小括号内一步加减,中括号内乘除运算
(1)[(640 - 320) ÷ 8] × 12
= [320 ÷ 8] × 12
= 40 × 12
= 480
(2)[(280 + 320) × 5] ÷ 30
= [600 × 5] ÷ 30
= 3000 ÷ 30
= 100
(3)450 ÷ [(150 - 100) × 3]
= 450 ÷ [50 × 3]
= 450 ÷ 150
= 3
(4)560 × [(210 + 190) ÷ 8]
= 560 × [400 ÷ 8]
= 560 × 50
= 28000
(5)[(720 - 480) × 4] ÷ 60
= [240 × 4] ÷ 60
= 960 ÷ 60
= 16
(6)[(350 + 250) ÷ 10] × 18
= [600 ÷ 10] × 18
= 60 × 18
= 1080
(7)810 ÷ [(360 - 270) ÷ 3]
= 810 ÷ [90 ÷ 3]
= 810 ÷ 30
= 27
(8)320 × [(540 - 360) ÷ 9]
= 320 × [180 ÷ 9]
= 320 × 20
= 6400
四、中括号内包含两步运算(先乘除后加减)
(1)600 ÷ [(30 + 20) × 3 - 90]
= 600 ÷ [50 × 3 - 90]
= 600 ÷ [150 - 90]
= 600 ÷ 60
= 10
(2)[180 + (45 × 4) - 120] × 5
= [180 + 180 - 120] × 5
= [360 - 120] × 5
= 240 × 5
= 1200
(3)900 ÷ [(120 ÷ 6) + (80 - 50)]
= 900 ÷ [20 + 30]
= 900 ÷ 50
= 18
(4)[(25 × 8) + (360 ÷ 12) - 150] × 4
= [200 + 30 - 150] × 4
= [230 - 150] × 4
= 80 × 4
= 320
(5)720 ÷ [(15 × 6) - (180 ÷ 3)]
= 720 ÷ [90 - 60]
= 720 ÷ 30
= 24
(6)[(70 × 5) - (210 ÷ 7) + 80] × 2
= [350 - 30 + 80] × 2
= [320 + 80] × 2
= 400 × 2
= 800
(7)576 ÷ [(240 ÷ 8) + (35 - 17)])
= 576 ÷ [30 + 18]
= 576 ÷ 48
= 12
(8)[(12 × 15) + (480 ÷ 16) - 130] × 3
= [180 + 30 - 130] × 3
= [210 - 130] × 3
= 80 × 3
= 240
五、综合类型(括号内包含两步运算)
(1)[(160 + 240) ÷ 8 - 20] × 15
= [400 ÷ 8 - 20] × 15
= [50 - 20] × 15
= 30 × 15
= 450
(2)880 ÷ [(30 × 5) - (250 ÷ 5) + 10])
= 880 ÷ [150 - 50 + 10]
= 880 ÷ 110
= 8
(3)[(420 - 180) ÷ 6 + 35] × 12
= [240 ÷ 6 + 35] × 12
= [40 + 35] × 12
= 75 × 12
= 900
(4)675 ÷ [(18 × 5) - (120 ÷ 4) + 15])
= 675 ÷ [90 - 30 + 15]
= 675 ÷ 75
= 9
(5)[(280 + 320) ÷ 10 - 45] × 18
= [600 ÷ 10 - 45] × 18
= [60 - 45] × 18
= 15 × 18
= 270
(6)900 ÷ [(25 × 4) - (180 ÷ 6) + 20])
= 900 ÷ [100 - 30 + 20]
= 900 ÷ 90
= 10
(7)[(560 - 320) ÷ 4 + 28] × 10
= [240 ÷ 4 + 28] × 10
= [60 + 28] × 10
= 88 × 10
= 880
(8)800 ÷ [(12 × 8) - (90 ÷ 3) + 14])
= 800 ÷ [96 - 30 + 14]
= 800 ÷ 80
= 10
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