2,43, 1, (32-8)÷6=4 (pieces) 2, 15-2+ 15=28 (pieces)
Page 40: 1. Kilograms, grams, centimeters and meters. (Distinguish length units from mass units)
Third, look at the order of demand from small to large, and connect with less than sign in the middle.
Fourth, 12÷4=3 (meters) Analysis: Fold it twice and then fold it into four sections.
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