Basic Facts T3W8

T3W8

Round to the nearest 10, 100 or 1000:

1. 99-100
2. 199-200
3. 39-40
4. 999-1000
5. 58-60
6. 177-180
7. 1119-1120
8. 88-90
9. 769-770
10. 569-570

Multiply by 10, 100 and 1000:

1. 1 x 1000=1000
2. 2 x 60=120
3. 7 x 700=490
4. 6 x 50=300
5. 100 x 40=4000
6. 650 x 3=1950
7. 190 x 2=380
8. 40 x 40=1600
9. 16 x 16=256
10. 500 x 3=1500

Use rounding and compensating to multiply:

1. 4 x 39= 4 x 40=160-4 =156
2. 3 x 19=3 x 20=60-3=57
3. 20 x 19=20 x 20=  400-20=380
4. 100 x 99=100x100=10000-100=9900
5. 7 x 29=7x30=210-7=203
6. 16 x 9=16 x 10=160-16=144
7. 0 x 999=0 x 10000=0-0=0
8. 6 x 59=6 x 60=360-6=354
9. 9 x 49=9 x 50=450-9=441
10. 5 x 69=5 x 70=350-5=345

1. 1.34

2. 2.52

3.59 secs

WALT:instantly recall our basic facts.

I have timed my self three times to see how fast I can recall my basic facts.

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