II:Fill in the missing number/ s to make each equation correct. 1.)12+12+11=6×_ A.6 B.7 C.8 D.9 2.7×7=15+22+_ A.12 B.13 C.14 D.15 3.)29×_=0 A.0 B.1 C.2 D.4 4.)50-(2×3)=12+21+_ A.9 B.10 C.11 D.12 5.)4(6+1)=(_×6)+(4×_) A.1,5 B.4,1 C.4,6 D.6,1
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Answer:
1.a
2.b
3.d
4.a
5.c
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