1) Use doubles to solve 40+48 a) 40+40+8 b) 40+8 c) 40+40 2) Use doubles to solve 36+30 a) 30+30 b) 30+30+6 c) 30+36 3) Use doubles to solve 90+99 a) 9+9 b) 90+80 c) 90+90+9 4) Use doubles to solve 25+25 a) 20+20+5+5 b) 10+10 c) 20+5 5) What is the sum of 60+62? a) 124 b) 122 c) 12 6) What is the sum of 87+80? a) 16 b) 154 c) 167 7) What is the sum of 29+20 a) 50 b) 49 c) 45 8) Use your knowledge of doubles to tell how many dots you see. a) 4+4+1 b) 5+4 c) 4+5 9) Use your knowledge of doubles to tell how many dots you see. a) 2+3 b) 2+2+1 c) 3+2 10) Use your knowledge of doubles to tell how many dots you see. a) 6+1 b) 3+3+1 c) 4+3 11) Use your knowledge of doubles to tell how many dots you see. a) 1+1+1 b) 2+1 c) 3

Doubles to Add 2 digit numbers

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