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800÷25用简便方法计算怎么算 用简便方法计算.(1) 6 1 5 +4.25+ 3 4 5
用简便方法计算.(1) 6 1 5 +4.25+ 3 4 5 用简便方法计算.(1) 6 1 5 +4.25+ 3 4 5 (1)6 1 5 +4.25+3 4 5 +5.75,=(6 1 5 +3
用简便方法计算.(1) 6 1 5 +4.25+ 3 4 5
用简便方法计算.(1) 6 1 5 +4.25+ 3 4 5
(1)6 1 5 +4.25+3 4 5+5.75,
=(6
+3
4 5)+(4.25+5.75),
=10+10,
=20;
(2)24×101,
=24×(100+1),
=2400+24,
=2424.
5/6×4.25+3/4÷6用简便方法计算是?
=5/6*25/4+3/4/6
=(125+3)/24
=128/24
=16/3

1+2+3+4+5チ6¥8+19用简便方法计算
1+2+3+4+5+……+18+19
=(1+19)×19÷2
=190
用简便方法计算12,5÷3,6+9,1÷3,6
12,5÷3,6+9,1÷3,6
=(12,5+9,1)÷3,6
=21.6÷3,6
=6
我会用简便方法计算. 36 1 5 × 5 6
36 1 5 × 5 6,
=(36+
)×
5 6,
=36×
+
1 5×
5 6,
=30+
,
=30
.
60000-1-3-5-.-99用简便方法计算
60000-1-3-5-.......-99
=60000-(1+3+5+...+99)
=60000-(1+99)×50÷2
=60000-2500
=57500
用简便方法计算4·3-1·27+5·7-3·73
4·3-1·27+5·7-3·73
=(4·3+5.7)-(1·27+3·73)
=10-5
=5
简便方法计算:49·5x1·6=?
简便方法计算:49·5x1·6=?
解答
49.5×1.6
=49.5×2×0.8
=99×0.8
=(100-1)×0.8
=80-0.8
=79.2
17.5÷2·5x1·4用简便方法计算?
17.5÷2·5x1·4
=7x1·4
=9.8
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