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5 ×( 7 – 3)= 5 ×4= 20
7 +22= 7 +4= 11
9 +12 ÷ 3= 9 +4= 13
10 + 2× 3= 10 +6= 16
4 × 3+ 5 =12+ 5 = 17
10 ÷ 2– 2 =5– 2 = 3