Gold
WALT: know that multiplication is the same as repeated addition.
How to multiply decimals
1.5 x 2 = ?
1.5 x 2 is the same as:
1 x 2 = 2
+
0.5 x 2 =
0.5 (move 1 decimal place)
5 X 2 = 10 (move 1 decimal place back) 0.5 X 2 = 1
1
0.5
1 x 2 =
0.5 x 2 =
2
1
=
3
2.6 x 3 = ?
2.6 x 3 is the same as:
2 x 3 =
+
0.6 x 3 =
2
0.6
2 x 3 =
0.6 x 3 =
=
2.5 x 4 = ?
x 4 =
x 4 =
=
2.5 x 4 is the same as:
2 x 4 =
+
0.5 x 4 =
2.7 x 3 = ?
x 3 =
x 3 =
=
2.7 x 3 is the same as:
2 x 3 =
+
0.7 x 3 =
For cross country training, Jin would run 2.3km each day. He started on Monday and ran for 5 days. In total, how many km did Jin run?
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