Year 3, Unit 1, Week 2, Lesson 4 Homework
Name:
Date:
Mental addition and subtraction Add and subtract numbers mentally a 61 + 6
=
b 57 + 7
=
c 82 + 5
=
d 56 + 40 =
e 68 + 30 =
f 46 − 5
=
g 31 − 6
h 57 − 4
=
=
i 69 − 20 =
j 72 − 40 =
a 143 + 6 =
b 286 + 7 =
c 368 + 30 =
d 387 + 70 =
e 492 + 60 =
f 229 − 7 =
g 281 − 6 =
h 386 − 50 =
i 413 − 40 =
j 532 − 60 =
a 428 + 7 =
b 539 + 9 =
c 683 + 70 =
d 791 + 80 =
e 865 + 50 =
f 376 − 9 =
g 781 – 5 =
h 634 − 50 =
i 812 – 70 =
j 903 − 60 =
Choose one type of calculation, such as a 3-digit number add 10s. Explain to someone at home how to work out the answer. Then, on the back of this sheet, write four calculations for them to work out using your method. © HarperCollinsPublishers Ltd. 2014