2.8*7.2-2.8+3.8*2.8怎么简便
2.8*7.2-2.8+3.8*2.8怎么简便
2.8*7.2-2.8+3.8*2.8
=2.8x(7.2-1+3.8)
=2.8x(7.2+3.8-1)
=2.8x(11-1)
=2.8x10
=28
7.2 2.8×19怎么简便
7.2×19+2.8×19
=(7.2+2.8)×19
=10×19
=190
[3.8+3.8×(3.8-2.8)]÷(2.8-1.8) 用简便算法算
=(3.8+3.8*1)/1
=7.6
求2.8×25-2.8×7.2/2.8/3.6的简便方法
解:采用结合律和拆分法,
原式=0.7x4x25-2.8x7.2÷2.8÷3.6
=0.7x100-2.8÷2.8x(7.2÷3.6)
=70-1x2
=70-2
=68
3.8-2.8+3.8-2.8这道题简便运算
3.8-2.8+3.8-2.8
=(3.8-2.8)+(3.8-2.8)
=1+1
=2
10.72一2.8十2.28—7.2怎么简便
10.72一2.8十2.28—7.2
=10.72十2.28-2.8—7.2
=(10.72+2.28)-(2.8+7.2)
=13-10
=3
3.6*7.2+36*2.8简便
原式应该是:
3.6x7.2+3.6x2.8
=3.6x(7.2+2.8)
=3.6x10
=36
供参考。
5.4×2.8+7.2×5.4简便
54
解析:
5.4×2.8+7.2×5.4
=5.4×(2.8+7.2)
=5.4×10
=54
2.8×38+63×2.8-2.8怎么简便
原式等于
2.8×(38+63-1)
=2.8×100
=280
所以原式的结果为280.
23.5-2.8-7.2用简便怎么写
23.5-2.8-7.2
=23.5-(2.8+7.2)
=23.5-10
=13.5
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