Addition and subtraction Remember Addition Use any method for addition that you 40 + 40 + 40+ 5+ 5 40 + 40 + 40 +5 100 + 100 +can 100use +quickly feel+you and+ efficiently. 367 367 367
367
3 63763 76 7 3 63763 76 7 3 63763 76 7 + 1+81+581 58 5 + 1+81+581 58 + 5 1+81+581 58 5 300 + 100 + 100 4 04004 0 300 + 100 1 21 21 2 5 55255 25 2 0 0300 60 +60 80 + 80 1 41041 0 + 80 1 41541 54 5 1 1 1 11 1 4 060 71 2 +7 5+ 1 21 2 75 +5 4 04004 00 0 3 25 62 7 367 3 6 7 5 55255 552 467 467 467 507 507 547 552 507 547 547 552 5 55255 25 2 +185 +185 +185 + 40 + 40 +5 + 100 12 4 0 0 300 + 100 552 1 1 145 1 4 0 60 + 80 400 12 7 + 5 552 552 467 507 547 552
Subtraction Subtract: 325 – 58 Use whichever method you prefer, to work quickly and efficiently. – 60 +2 265
2 11 1
200 + 110 + 15 – 50 8 200 + 60 + 7
267
325 – 58 267
325
1 Highest score – a game for two players
9
Take turns to spin the spinner and write down the number in one of the boxes in your grid. Continue until all the boxes are filled. Add the two three-digit numbers. The player with the higher total wins. The first player to win three rounds is the champion. Player 1
0
8
2
7
3 6
5
4
Player 2 +
= ____________
+
= ____________
+
= ____________
+
= ____________
+
= ____________
+
= ____________
Explain to the other player how you work out each answer. Record the calculation and the method.
10
1
Unit 1A: Number and problem solving, Unit 2A: Number and problem solving, Unit 3A: Number and problem solving CPM framework 5Nc18, 5Nc19, 5Ps2; Teacher’s Resource 2.1, 2.2, 13.1, 13.2, 25.1