脫式計(jì)算(能簡(jiǎn)要的要簡(jiǎn)算)。
(1)8.4×0.98+0.2×0.84 (2)8.56+0.44×20÷32
(3)0.8×(4-3.32)÷0.01 (4)1.2×0.4+1.3×0.4
(1)原式=8.4×(0.98+0.02)
                =8.4×1
                =8.4
(2)原式=8.56+8.8÷32
                =8.56+0.275
                =8.835
(3)原式=0.8×0.68÷0.01
                =0.544÷0.01
                =54.4
(4)原式=(1.2+1.3)×0.4
                =2.5×0.4
                =1
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