2 câu trả lời
Đáp án:
$7dam+7m+7dm=700dm+70dm+7dm=770dm$
$8hm-7dam-8m=800m-70m-8m=722m$
$6dam+4m-9dm=600dm+40dm-9dm=631dm$
Câu hỏi trong lớp
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Đáp án:
$7dam+7m+7dm=700dm+70dm+7dm=770dm$
$8hm-7dam-8m=800m-70m-8m=722m$
$6dam+4m-9dm=600dm+40dm-9dm=631dm$