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能简算的要简算
20-(6.8-3.02)+1.097=
[ ]
A.3 B.17.317
C.18.92 D.16.07
4.25-0.83+0.75-1.17=
用一根52厘米长的铁丝,正好可以焊成长6厘米,宽4厘米,高________厘米的长方体教具.
A.3 B.4 C.5
减去的差,除以,商是
A.3
B.
C.
D.1