Year 3 Subtracting Lengths You can subtract lengths

Year 3 Subtracting Lengths

You can subtract lengths either mentally or by using column subtraction. Remember to always check your work. Yellow task e. g. 63 cm – 35 cm • Set out in a column • Subtract ones but if you can’t do it, then exchange a ten. Record correctly. • Subtract tens. • Record answer with units. 1 5 63 cm - 35 cm 28 cm

You can subtract lengths either mentally or by using column subtraction. Remember to always check your work. Blue task e. g. 361 mm – 124 mm • Set out in a column • Subtract ones but if you can’t do it, then exchange a ten. Record correctly. • Subtract tens. • Subtract hundreds. • Record answer with units. 5 - 1 361 mm 124 mm 237 mm

You can subtract lengths either mentally or by using column subtraction. Remember to always check your work. • Set out in a column • Subtract ones • Subtract tens but if you can’t do it, then exchange a hundred. Record correctly. • Subtract hundreds. • Record answer with units. Green task e. g. 628 mm – 243 mm 1 5 628 mm - 243 mm 385 mm

You can subtract lengths either mentally or by using column subtraction. Remember to always check your work. • Set out in a column • Subtract ones but if you can’t do it, then exchange a ten. Record correctly. • Subtract tens but if you can’t do it, then exchange a hundred. Record correctly. • Subtract hundreds. • Record answer with units. White task e. g. 521 cm – 145 cm 11 1 4 521 cm - 145 cm 376 cm

Remember to start on a challenge suitable for you. If you’re feeling confident, move onto the next challenge. 48 cm – 15 cm 232 cm – 114 cm 421 cm – 140 cm 322 mm – 146 mm 75 cm – 34 cm 281 mm – 145 mm 536 m – 264 m 543 cm – 165 cm 62 cm – 46 cm 370 cm – 133 cm 328 mm – 157 mm 630 m – 268 m 83 cm – 55 cm 564 mm – 228 mm 406 cm – 125 cm 467 mm – 389 mm 71 cm – 36 cm 740 cm – 423 cm 719 m – 150 m 572 m – 375 m 90 cm – 53 cm 875 m – 437 m 407 mm – 125 mm 461 cm – 364 cm

Check your answers. If you got any wrong, can you spot your mistake? 48 cm – 15 cm = 33 cm 232 cm – 114 cm = 118 cm 421 cm – 140 cm = 281 cm 322 mm – 146 mm = 176 mm 75 cm – 34 cm = 41 cm 62 cm – 46 cm = 16 cm 281 mm – 145 mm = 136 mm 370 cm – 133 cm = 237 cm 536 m – 264 m = 272 m 328 mm – 157 mm = 171 mm 543 cm – 165 cm = 378 cm 630 m – 268 m = 362 m 83 cm – 55 cm = 28 cm 71 cm – 36 cm = 35 cm 564 mm – 228 mm = 336 mm 740 cm – 423 cm = 317 cm 406 cm – 125 cm = 281 cm 719 m – 150 m = 569 m 467 mm – 389 mm = 78 mm 572 m – 375 m = 197 m 90 cm – 53 cm = 37 cm 875 m – 437 m = 438 m 407 mm – 125 mm = 282 mm 461 cm – 364 cm = 97 cm