Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
70 + 20 = ______
61 + 20 = ______
71 + 10 = ______
1 × 10 = ______
26 − 10 = ______
66 + 10 = ______
3 × 10 = ______
4 × 10 = ______
43 − 10 = ______
40 + 10 = ______
26 + 20 = ______
76 − 10 = ______
88 − 10 = ______
65 − 10 = ______
39 + 20 = ______
33 + 20 = ______
53 + 20 = ______
30 − 10 = ______
67 + 20 = ______
17 + 10 = ______
