简便方法计算。0.25x9.2x40,3.58x0.89+0.11x3.58,48x1.25,3.
简便方法计算。0.25x9.2x40,3.58x0.89+0.11x3.58,48x1.25,3.5x1.4+36.5x1.1+36.5x0.3,99x19.72+19....
简便方法计算。0.25x9.2x40,3.58x0.89+0.11x3.58,48x1.25,3.5x1.4+36.5x1.1+36.5x0.3,99x19.72+19.72
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1解:
0.25X9.2X40
=0.25X40X9.2
=10X9.2
=92
2解:
3.58X0.89+0.11X3.58
=3.58X(0.89+0.11)
=3.58X1
=3.58
3解: 48X1.25
=6X8X1.25
=6X(8X1.25)
=6X10
=60
4解:
3.5X1.4+36.5x1.1+36.5X0.3
=3.5X1.4+36.5X(1.1+0.3)
=(3.5+36.5)X1.4
=40X1.4
=56
5解:
99X19.7+19.72
=19.7X(99+1)
=19.7X100
=1970
0.25X9.2X40
=0.25X40X9.2
=10X9.2
=92
2解:
3.58X0.89+0.11X3.58
=3.58X(0.89+0.11)
=3.58X1
=3.58
3解: 48X1.25
=6X8X1.25
=6X(8X1.25)
=6X10
=60
4解:
3.5X1.4+36.5x1.1+36.5X0.3
=3.5X1.4+36.5X(1.1+0.3)
=(3.5+36.5)X1.4
=40X1.4
=56
5解:
99X19.7+19.72
=19.7X(99+1)
=19.7X100
=1970
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