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脱式计算,能简便的要简便4.05÷81+196.28-(1.28+2.18)2.9+0.46+8.1+0.548×(1.25+12.5)0.6×[25-(8.7-3.7)].
题目详情
脱式计算,能简便的要简便
4.05÷81+19
6.28-(1.28+2.18)
2.9+0.46+8.1+0.54
8×(1.25+12.5)
0.6×[25-(8.7-3.7)].
4.05÷81+19
6.28-(1.28+2.18)
2.9+0.46+8.1+0.54
8×(1.25+12.5)
0.6×[25-(8.7-3.7)].
▼优质解答
答案和解析
(1)4.05÷81+19
=0.05+19
=19.05;
(2)6.28-(1.28+2.18)
=6.28-1.28-2.18
=5-2.18
=2.82;
(3)2.9+0.46+8.1+0.54
=(2.9+8.1)+(0.46+0.54)
=11+1
=12;
(4)8×(1.25+12.5)
=8×1.25+8×12.5
=10+100
=110;
(5)0.6×[25-(8.7-3.7)]
=0.6×[25-5]
=0.6×20
=12.
=0.05+19
=19.05;
(2)6.28-(1.28+2.18)
=6.28-1.28-2.18
=5-2.18
=2.82;
(3)2.9+0.46+8.1+0.54
=(2.9+8.1)+(0.46+0.54)
=11+1
=12;
(4)8×(1.25+12.5)
=8×1.25+8×12.5
=10+100
=110;
(5)0.6×[25-(8.7-3.7)]
=0.6×[25-5]
=0.6×20
=12.
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