简便计算第一题：3.6乘34加36乘6.6第二题：7.5乘23加0.75乘770第三题：0.63乘43加0.57乘63第四题：93乘0.6加9.3乘4

Question

简便计算
第一题：3.6乘34加36乘6.6第二题：7.5乘23加0.75乘770第三题：0.63乘43加0.57乘63第四题：93乘0.6加9.3乘4

Answer 1

3.6×34+36×6.6
=3.6×34+3.6×66
=3.6×(34+66)
=3.6×100
=3600
7.5×23+0.75×770
=7.5×23+7.5×77
=7.5×(23+77)
=7.5×100
=750
0.63×43+0.57×63
=0.63×43+0.63×57
=0.63×(43+57)
=0.63×100
=63
93×0.6+9.3×4
=93×0.6+93×0.4
=93×(0.6+0.4)
=93×1
=93