Question

3.6×9.5+0.95×63+95的简便运算？

Answer 1

3.6×9.5+0.95×63+95
=3.6x9.5+0.95x10x6.3+95
=3.6x9.5+9.5x6.3+95
=9.5x(3.6+6.3) +95
=9.5x9.9+95
=9.5x(10-0.1) +95
=9.5x10-9.5x0.1 +95
=95+95-0.95
=190 - 0.95
=189.05

Answer 2

3.6x9.5+0.95x63+95
=3.6x9.5+9.5x6.3+95
=(3.6+6.3)x9.5+95
=9.9x9.5+95
=(10-0.1)x9.5+95
=10x9.5-0.1x9.5+95
=95-0.95+95
=94.05+95
=189.05

Answer 3

首先把9.5,0.95,95换算成相同的数，统一换成0.95,可以写成
=3.6×10×0.95+0.95×63+100×0.95
=36×0.95+63×0.95+100×0.95
=（36+63+100）×0.95
=199×0.95
=（200-1）×0.95
=200×0.95-1×0.95
=190-0.95
=189.05