问题描述:
不会
最佳答案:
解法一:
3.4x7x1.5
=3.4x(7x1.5)
=3.4x10.5
=3.4x(10+0.5)
=3.4x10+3.4x0.5
=34+1.7
=35.7
解法二:
3.4x7x1.5
=3.4x1.5x7
=5.1x7
=35.7
解法三:
3.4x7x1.5
=(2x1.7)x7x1.5
=2x1.5x1.7x7
=3x1.7x7
=5.1x7
=35.7
解法四:
3.4×7×1.5
=(2x1.7)x7x1.5
=(1.7×7)×(2×1.5)
=11.9×3
=35.7