问题
解答题
用合理的方法计算.(共9道)
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答案
(1)68+176+232+824
=(68+232)+(176+824)
=300+1000
=1300
(2)57×99
=57×(100-1)
=57×100-57
=5700-57
=5643
(3)(3432÷33-24)÷16
=(104-24)÷16
=80÷16
=5
(4)125×45-125×37
=125×(45-37)
=125×8
=1000
(5)(25+4)×4
=25×4+4×4
=100+16
=116
(6)25×32×125
=(25×4)×(8×125)
=100×1000
=100000
(7)7100-137-263+300
=(7100+300)-(137+263)
=7400-400
=7000
(8)4800÷(48×2)
=4800÷48÷2
=100÷2
=50
(9)51×34+49×34
=(51+49)×34
=100×34
=3400