| 简便计算。 | ||||||
|
(1)
=
=11.2 (2)
=3.4-
=2.4 (3)2.5×32×12.5
=2.5×4×8×12.5
=(2.5×4)×(8×12.5)
=10×100
=1000 (4)3.4×5.6+5.6×6.6
=5.6×10
=56
(5)10.2 ×43
=(10+0.2)×43
=430+8.6
=438.6
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