计算下面各题,能简算的一定要简算.
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(1)700÷25,
=700÷(5×5),
=700÷5÷5,
=140÷5,
=28;
(2)125×32×2,
=125×8×4×2,
=(125×8)×(4×2),
=1000×8,
=8000;
(3)27×45+55×27,
=27×(45+55),
=27×100,
=2700;
(4)126÷[(105-98)×2],
=126÷[7×2],
=126÷14,
=9.
计算下面各题,能简算的一定要简算.
|
(1)700÷25,
=700÷(5×5),
=700÷5÷5,
=140÷5,
=28;
(2)125×32×2,
=125×8×4×2,
=(125×8)×(4×2),
=1000×8,
=8000;
(3)27×45+55×27,
=27×(45+55),
=27×100,
=2700;
(4)126÷[(105-98)×2],
=126÷[7×2],
=126÷14,
=9.