计算下面各题(能简算的要简算) (1)89+124+11+26+48 (2)(64-224÷14)×12 (3)120×
计算下面各题(能简算的要简算)(1)89+124+11+26+48(2)(64-224÷14)×12(3)120×(38+405÷27)(4)163×25+237×25(...
计算下面各题(能简算的要简算) (1)89+124+11+26+48 (2)(64-224÷14)×12 (3)120×(38+405÷27) (4)163×25+237×25 (5)384+98×25×4 (6)724+26×24-724 (7)365×99 (8)125×64.
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(1)89+124+11+26+48
=(89+11)+(124+26+48)
=100+198
=298;
(2)(64-224÷14)×12
=(64-16)×12
=48×12
=576;
(3)120×(38+405÷27)
=120×(38+15)
=120×53
=6360;
(4)163×25+237×25
=(163+237)×25
=400×25
=10000;
(5)384+98×25×4
=384+98×(25×4)
=384+98×100
=384+9800
=10184;
(6)724+26×24-724
=724-724+26×24
=26×24
=26×4×6
=104×6
=624;
(7)365×99
=365×(100-1)
=365×100-365×1
=36500-365
=36135;
(8)125×64
=125×8×8
=1000×8
=8000.
=(89+11)+(124+26+48)
=100+198
=298;
(2)(64-224÷14)×12
=(64-16)×12
=48×12
=576;
(3)120×(38+405÷27)
=120×(38+15)
=120×53
=6360;
(4)163×25+237×25
=(163+237)×25
=400×25
=10000;
(5)384+98×25×4
=384+98×(25×4)
=384+98×100
=384+9800
=10184;
(6)724+26×24-724
=724-724+26×24
=26×24
=26×4×6
=104×6
=624;
(7)365×99
=365×(100-1)
=365×100-365×1
=36500-365
=36135;
(8)125×64
=125×8×8
=1000×8
=8000.
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