题目内容
3
×40%-2.25÷2
+1.55×1
.
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3
×40%-2.25÷2
+1.55×1
,
=3.8×0.4-2.25÷2.5+1.55×1.6,
=1.52-0.9+2.48,
=3.1.
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=3.8×0.4-2.25÷2.5+1.55×1.6,
=1.52-0.9+2.48,
=3.1.
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