连加和连减 4 + 1 = + 2 = 2 + 4 = + 3 = 8 – 1 = – 4 = 10 – 6 = – 1 = 53 4 9 673 7 AB CD5674 4 + 3 = 77 + 1 = 8 4 + 3 + 1 = 7 8 8 – 2 = 1 66– 5 = 8 – 2 – 5 = 6 1 4+3+ = 1、看图,填数。?18 2+ + = 853 ? ?只 3+ += 429 ?枝 5+ +=139 10 –2– = 62 2、横行、竖行上的数相加,各得多少? 32154 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) 16343 2215 88 10 8989 10 看谁算对又快
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