题目内容
脱式计算,能简算的要简算.
(1)10.5+0.5÷0.5
(2)105×7.3-7.3×4-7.3
(3)29.07-22.78÷3.4
(4)4.8×0.25
(5)0.8×(12.5-1.25)
(1)10.5+0.5÷0.5
(2)105×7.3-7.3×4-7.3
(3)29.07-22.78÷3.4
(4)4.8×0.25
(5)0.8×(12.5-1.25)
(1)10.5+0.5÷0.5,
=10.5+1,
=11.5;
(2)105×7.3-7.3×4-7.3,
=(105-4-1)×7.3,
=100×7.3,
=730;
(3)29.07-22.78÷3.4,
=29.07-6.7,
=22.37;
(4)4.8×0.25,
=1.2×4×0.25,
=1.2×(4×0.25),
=1.2×1,
=1.2;
(5)0.8×(12.5-1.25),
=0.8×12.5-0.8×1.25;
=10-1,
=9.
=10.5+1,
=11.5;
(2)105×7.3-7.3×4-7.3,
=(105-4-1)×7.3,
=100×7.3,
=730;
(3)29.07-22.78÷3.4,
=29.07-6.7,
=22.37;
(4)4.8×0.25,
=1.2×4×0.25,
=1.2×(4×0.25),
=1.2×1,
=1.2;
(5)0.8×(12.5-1.25),
=0.8×12.5-0.8×1.25;
=10-1,
=9.
练习册系列答案
相关题目