3.45X0.6X2.8的简便方法怎么做?
3.45X0.6X2.8的简便方法怎么做?
=3.45X0.6X(3-0.2)
=2.07X3-2.07X0.2
=6.21-0.414
=5.796
简便方法:3.45x99怎么做
简便方法:3.45x99怎么做
3.45*99
=3.45*(100-1)
=3.45*100-3.45
=345-3.45
=341.55
0.6x2.5x0.5x4用简便方法计算怎么做?
0.6x2.5x0.5x4
=(0.6×0.5)×(2.5×4)
=0.3×10
=3
3.45十0.36x12用简便方法怎么做?
3.45十0.36x12
=3.45十4.32
=7.77
4.9x0.5x0.6用简便方法怎么做
4.9x0.5x0.6用简便方法怎么做
解:
4.9x0.5x0.6
=4.9x0.3
=(5-0.1)x0.3
=5x0.3-0.1x0.3
=1.5-0.03
=1.47
8.4X0.6X5简便方法怎么做
8.4X0.6X5简便方法怎么做
=8.4x(0.6x5)
=8.4x3
=25.2
4.28十0.6x0.5的简便方法怎么做
4.28十0.6x0.5的简便方法怎么做
4.28十0.6x0.5
=4.28+0.3
=4.58
直接计算
1.25x2.5x24用简便方法怎么做
1.25x2.5x24
=(1.25x8)x(2.5x3)
=10x7.5
=75
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6X25+16X25简便方法怎么做
=(6+16)*25
=22*25
=550
2.5x2.8用简便方法怎么算?
2.5x2.8
=2.5x4x0.7
=10x0.7
=7