Question

37×0.39×0.37×61脱式计算？

Answer 1

37×0.39×0.37×61
=3.7*3.7*3.9*（10-3.9）
=（4-0.3）²*（39-3.9²）
=（16+0.09-2.4）*（39-3.9²）
=13.69*39-13.69*（4-0.1）²
=13.69*40-13.69-13.69*（16+0.01-0.8）
=520+27.6-13.69*（17.01-0.8）
=547.6-13.69*16.21
=325.6851

Answer 2

37×0.39×0.37×61
=14.43×0.37×61
=14.43×0.37×（60+1）
=14.43×0.37×60+14.43×0.37×1
=14.43×0.37×60+14.37×0.37
=14.43×（0.37×60+0.37）
=14.43×（22.2+0.37）
=14.43×22.57
=325.6851

Answer 3

37×0.39+0.37×61
= 0.37×39+0.37×61
= 0.37×(39+61)
= 0.37×100
= 37