问题
解答题
用脱式计算.
128+840÷6
420-400÷5
(270-180)×7.
答案
(1)128+840÷6,
=128+140,
=268;
(2)420-400÷5,
=420-80,
=340;
(3)(270-180)×7,
=90×7,
=630.
用脱式计算.
128+840÷6
420-400÷5
(270-180)×7.
(1)128+840÷6,
=128+140,
=268;
(2)420-400÷5,
=420-80,
=340;
(3)(270-180)×7,
=90×7,
=630.