问题
解答题
用你喜欢的方法计算.
30×(320-170)÷90
340+240÷20×15
27×45+27×55.
答案
(1)30×(320一170)÷90,
=30×150÷90,
=4500÷90,
=50;
(2)340+240÷20×15,
=340+12×15,
=340+180,
=520;
(3)27×45+27×55,
=27×(45+55),
=27×100,
=2700.
用你喜欢的方法计算.
30×(320-170)÷90
340+240÷20×15
27×45+27×55.
(1)30×(320一170)÷90,
=30×150÷90,
=4500÷90,
=50;
(2)340+240÷20×15,
=340+12×15,
=340+180,
=520;
(3)27×45+27×55,
=27×(45+55),
=27×100,
=2700.