Question

How to add +4&+3 using number line

Answer 1

1. 2. 3. 4. 5

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_1_2_3_4_5_6_7_8_9_10_11_12_13_14_15_

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we have to add +4 &+5

so we will point 4 and start counting 5

and answer came 9

so +4+5 =9