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
9 × 10 = ______
51 + 20 = ______
71 + 10 = ______
71 − 10 = ______
41 + 10 = ______
42 − 10 = ______
71 + 20 = ______
93 − 10 = ______
37 + 20 = ______
44 + 20 = ______
83 − 10 = ______
1 × 10 = ______
34 + 20 = ______
87 + 10 = ______
70 + 10 = ______
3 × 10 = ______
33 + 20 = ______
73 − 10 = ______
46 − 10 = ______
2 × 10 = ______
