计算下面各题,怎样简便就怎样算. (1)(125+ 7 32 )×8 (2) 19 4 ×20%
计算下面各题,怎样简便就怎样算.(1)(125+732)×8(2)194×20%+194×45(3)25×32×125(4)99×1100(5)[34×(122-21-1...
计算下面各题,怎样简便就怎样算. (1)(125+ 7 32 )×8 (2) 19 4 ×20%+ 19 4 × 4 5 (3)25×32×125 (4)99× 1 100 (5)[ 3 4 ×(122-21-1)÷ 1 100 ] (6) 1 27 ÷ 4 5 × 125 2 × 4 5 ×270.
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(1)(125+
=125×8+
=1000+1.75, =1001.75; (2)
=
=
=
(3)25×32×125, =25×(4×8)×125, =(25×4)×(8×125), =100×1000, =100000; (4)99×
=(100-1)×
=100×
=1-
=
(5)
=
=75÷
=7500; (6)
=
=125×5, =625. |
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