口算。
+= -= += - +=
0.63×1000= 0. 75-0.25= 0.07+0.03= 0. 9÷0.03= 0.4×0.8=
(1)1-0.47= (2)6.4-4=
(3)0.25×12= (4)
(5) (6)
(7)0.88÷2.2= (8)0.08×0.5=
(9) (10)72.1×1000=
试题篮
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