式4a+3ab−1/2b减去−2a−3/2ab+1/3b的差是_.
问题描述:
式4a+3ab−
b减去−2a−1 2
ab+3 2
b的差是______. 1 3
答
(4a+3ab-
b)-(-2a-1 2
ab+3 2
b)1 3
=4a+3ab-
b+2a+1 2
ab-3 2
b1 3
=6a+
ab-9 2
b.5 6
故答案为:6a+
ab-9 2
b.5 6