计算下面各题:(能简算的要简算)6.7+25+3.3+75 103×12 ...
计算下面各题:(能简算的要简算)6.7+25+3.3+75103×1214.85-(4.85+2.5)15×99+159.14-1.43-4.572000÷125÷8....
计算下面各题:(能简算的要简算)6.7+25+3.3+75 103×12 14.85-(4.85+2.5)15×99+15 9.14-1.43-4.57 2000÷125÷8.
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(1)6.7+25+3.3+75
=(6.7+3.3)+(25+75),
=10+100,
=110;
(2)103×12
=(100+3)×12,
=100×12+3×12,
=1200+36,
=1236;
(3)14.85-(4.85+2.5)
=14.85-4.85-2.5,
=10-2.5,
=7.5;
(4)15×99+15
=(99+1)×15,
=100×15,
=1500;
(5)9.14-1.43-4.57
=9.14-(1.43+4.57),
=9.14-6,
=3.14;
(6)2000÷125÷8
=2000÷(125×8),
=2000÷1000,
=2.
=(6.7+3.3)+(25+75),
=10+100,
=110;
(2)103×12
=(100+3)×12,
=100×12+3×12,
=1200+36,
=1236;
(3)14.85-(4.85+2.5)
=14.85-4.85-2.5,
=10-2.5,
=7.5;
(4)15×99+15
=(99+1)×15,
=100×15,
=1500;
(5)9.14-1.43-4.57
=9.14-(1.43+4.57),
=9.14-6,
=3.14;
(6)2000÷125÷8
=2000÷(125×8),
=2000÷1000,
=2.
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