(30%乘以40%加68%的和乘以一加40%的和等于多少?
问题描述:
(30%乘以40%加68%的和乘以一加40%的和等于多少?
答
1.20
答
是(30%×40%+68%)×(1+40%)吧?
原式=(12%+68%)×1.4
=0.8×1.4
=1.12