Finger Calculation
| Finger Calculation LESSON 1 | ||
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| This is your RIGHT HAND… represents Unit | ||
| Now Let us practice the Finger Calculation (+) and ( – ) | ||
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| 1+1= |
2+2= |
3+1= |
| 9-2= |
5-3= |
8-3= |
| 9-4= |
7-1= |
4-2= |
| Exercise : Try it orally or by sight | |
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| (1) 1 + 3 – 4 (2) 2 + 1 – 2 (3) 3 + 1 – 2 (4) 5 + 2 – 1 (5) 9 – 6 – 3 |
(6) 8 + 1 – 9 (7) 4 – 2 + 6 (8) 7 – 5 + 2 (9) 6 – 1 – 5 (10) 2 + 2 + 5 |
| Finger Calculation LESSON 2 | ||
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| This is your LEFT HAND… represents Unit | ||
| Now Let us practice the Finger Calculation (+) and ( – ) | ||
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| 10+10= |
20+20= |
30+10= |
| 90-20= |
50-30= |
80-30= |
| Exercise : Try it orally or by sight | |
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| (1) 10 + 30 – 40 (2) 20 + 10 – 20 (3) 30 + 10 – 20 (4) 50 + 20 – 10 (5) 90 – 60 – 30 |
(6) 80 + 10 – 90 (7) 40 – 20 + 60 (8) 70 – 50 + 20 (9) 60 – 10 – 50 (10) 20 + 20+ 70 |
| Finger Calculation LESSON 3 | ||
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| Combination of both hands . . . | ||
| Now Let us practice the Finger Calculation (+) and ( – ) | ||
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| Exercise : Try it orally or by sight | |
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| (1) 10 + 30 – 40 (2) 20 + 10 – 20 (3) 30 + 10 – 20 (4) 50 + 20 – 10 (5) 90 – 60 – 30 |
(6) 80 + 10 – 90 (7) 40 – 20 + 60 (8) 70 – 50 + 20 (9) 60 – 10 – 50 (10) 20 + 20+ 70 |