# ABE Math Tutorials/Whole numbers/Introduction/Addition and Subtraction Facts

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## Addition and subtraction facts

This is the first lesson to go over your preknowledge on basic addition and subtraction.

# Self Assessment

 What are good solid arithmetic skills? Having good arithmetic skills means that you are able to do basic adding, subtracting, multiplying and dividing; quickly, "in your head", from memory. You should be able to answer the following questions like these from memory, without having to figure them out each time. On a piece of paper, write down the question number and your answer.

 1 4 + 8 = 2 20 ÷ 5 = 3 7 x 3 = 4 11 - 6 = 5 3 + 9 = 6 8 x 5 = 7 14 - 9 = 8 48 ÷ 6 = 9 4 x 8 = 10 7 + 5 = 11 64 ÷ 8 = 12 16 - 7 = 13 12 - 4 = 14 2 x 6 = 15 72 ÷ 9 = 16 7 + 7 = 17 9 x 6 = 18 11 - 9 = 19 8 + 6 = 20 35 ÷ 5 =

Mark yourself: Ready for the answers? Here they are: (1)12; (2)4; (3)21; (4)5; (5)12; (6)40; (7)5; (8)8; (9)32; (10)12; (11)8; (12)9; (13)8; (14)12; (15)8; (16)14; (17)54; (18)2; (19)14; (20)7.