74 + 87 | 32 x 50 |
24 + 76 | 25 x 4 |
25x(29+71) | (62-12)x4 |
61+39 | 4x8 |
55 x 42 + 55 x 18——(42 + 18) x 55 |
38 x 43 + 37 x 38——(43 + 37) x 38 |
55 x 42 - 55 x 18——(42 - 18) x 55 |
38 x 43 - 37 x 38——(43 - 37) x 38 |
=386+(254+46)
=386+300
=686
|
=500+(4+536)
=500+540
=1040
|
=25x4x8
=100x8
=800
|
=35x(65+35)
=35x100
=3500
|
=75x(141-41)
=75x100
=7500
|
=630÷9÷2÷5
=70÷(2x5)
=70÷10
=7
|
(1):46 + 37 + 63 + 54
=(46 + 54) + (37 + 63)
=100 + 100
=200
|
(2):最多:(63 + 54) x 5
=117 x 5 = 585元
最少:(46+37) x 5
=83 x 5 = 415元 |
共编的个数 | |
刘大伯 | 180 |
张大伯 | 520 |
王大伯 | 300 |
6、(8 + 6) x 180
=14 x 180
= 2520(米)
|
7、24 x(127 - 27)
= 24 x 100
= 2400(棵)
|
8、这块地原来的面积是:
(600 ÷ 15) 2 =1600(平方米) |
9、椅子的单价:
(150-72) ÷ (2 + 1) =26(元/把)
课桌的单价:
26 + 72 =98(元/张)。 |