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
30 + 20 = ______
29 + 20 = ______
4 × 10 = ______
57 − 10 = ______
8 × 10 = ______
22 + 20 = ______
3 × 10 = ______
40 + 20 = ______
54 + 20 = ______
20 + 10 = ______
58 + 10 = ______
92 − 10 = ______
85 + 10 = ______
46 − 10 = ______
68 + 10 = ______
48 − 10 = ______
70 − 10 = ______
84 + 20 = ______
20 + 20 = ______
28 + 20 = ______
