1. 3 × 7 + 3
= ( 7 + 7 + 7 ) + 3
= ( 14 + 7 ) + 3
= 21 + 3
= 24
2. 9 + 4 × 5
= 9 + ( 5 + 5 + 5 + 5 )
= 9 + ( 10 + 5 + 5 )
= 9 + ( 15 + 5 )
= 9 + 20
= 29
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1. 3 × 7 + 3
= ( 7 + 7 + 7 ) + 3
= ( 14 + 7 ) + 3
= 21 + 3
= 24
2. 9 + 4 × 5
= 9 + ( 5 + 5 + 5 + 5 )
= 9 + ( 10 + 5 + 5 )
= 9 + ( 15 + 5 )
= 9 + 20
= 29