0.25乘十二点五乘十六怎样简便运算
1.76乘十二点目录
零点儿四乘八乘二点五乘十二点儿五,列拖式计算怎样算更简便? 19.4乘2.5加7.5乘19点儿4,
零点儿四乘八乘二点五乘十二点儿五,列拖式计算怎样算更简便? 19.4乘2.5加7.5乘19点儿4,
零点儿四乘八乘二点五乘十二点儿五,列拖式计算怎样算更简便? 19.4乘2.5加7.5乘19点儿4,
0.48×2.5×12.5
=(0.6×2.5)×(12.5×0.8)
=1.5×10
=15
19.4×2.5 7.5×19.4
=19.4×(2.5 7.5)
=19.4×10
=194
2.44÷(2.7-2.09)×6.5
=2.44÷0.61×6.5
=4×6.5
=26
0.25乘十二点五乘十六怎样简便运算
解:原式=0.25x12.5x(4x4)
=(0.25x4)x(12.5x4)
=1x50
=50
分析:主要考察拆分法和结合律的运用。
零点儿四乘八乘二点五乘十二点儿五,列拖式计算怎样算更简便? 19.4乘2.5加7.5乘19点儿4,
0.48×2.5×12.5
=(0.6×2.5)×(12.5×0.8)
=1.5×10
=15
19.4×2.5 7.5×19.4
=19.4×(2.5 7.5)
=19.4×10
=194
2.44÷(2.7-2.09)×6.5
=2.44÷0.61×6.5
=4×6.5
=26
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